I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
retches wretches rotches ratches rechews reaches reechoes ruches riches reshes rouches roaches rechose reshoes rechoose rachis rashes rushes reshows rushees ratios rishis roshis
batches botches retches nautches fetches hitches cutches itches wretches matches ketches ratches fitches hutches patches quitches catches witches watches notches pitches letches vetches bitches etches butches ditches hootches hatches mutches hotches rotches aitches latches gouaches echoes ruches quiches cooches loaches fiches vichies fitchews laches beaches reaches lyches nitchies leches duchess duchies wiches wyches reechoes tachs chess muches aches rouches quaiches douches niches mooches pooches maches beeches roaches coaches techies miches litchis poaches rechews caches ouches riches boches naches lichees vouchees leaches liches gotchas couches chews touches datchas eches hooches seiches leeches pouches peaches taches hoochies lychees bouchees teaches baches vouches mouches techs
retch ratch reach rechew reecho reechy rotch rotche wretch creche